(19)
(11) EP 4 210 436 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
18.10.2023 Bulletin 2023/42

(43) Date of publication A2:
12.07.2023 Bulletin 2023/28

(21) Application number: 23150417.6

(22) Date of filing: 05.01.2023
(51) International Patent Classification (IPC): 
H05B 6/06(2006.01)
(52) Cooperative Patent Classification (CPC):
H05B 6/062; H05B 2213/05
(84) Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC ME MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated Extension States:
BA
Designated Validation States:
KH MA MD TN

(30) Priority: 05.01.2022 KR 20220001832
19.04.2022 KR 20220048529

(71) Applicant: LG Electronics, Inc.
Yeongdeungpo-gu Seoul 07336 (KR)

(72) Inventors:
  • JEONG, Sihoon
    08592 Seoul (KR)
  • KANG, John
    08592 Seoul (KR)
  • AHN, Hoseop
    08592 Seoul (KR)
  • KANG, Kyelyong
    08592 Seoul (KR)

(74) Representative: Ter Meer Steinmeister & Partner 
Patentanwälte mbB Nymphenburger Straße 4
80335 München
80335 München (DE)

   


(54) INDUCTION HEATING DEVICE AND METHOD OF CONTROLLING INDUCTION HEATING DEVICE


(57) An induction heating device according to an embodiment includes a rectifying circuit configured to rectify an AC voltage supplied from a power supply device, a smoothing circuit connected to the rectifying circuit and configured to smooth a voltage output from the rectifying circuit, an inverter comprising a plurality of switching elements and configured to supply current to a working coil, a shunt resistor connected between the smoothing circuit and the inverter, a drive circuit configured to supply switching signals to the plurality of switching elements provided in the inverter, respectively, and a controller configured to determine a driving frequency of the inverter and drive the working coil by supplying a control signal based on the driving frequency to the driving circuit.







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